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Flaring-Tub Slat-Reactor Churn: The Cream Climbs the Flare and Is Beaten Back by Slats
TheChef

Criado por

TheChef

6. outubro 2026DK
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Flaring-Tub Slat-Reactor Churn: The Cream Climbs the Flare and Is Beaten Back by Slats

Grover let the shape of the tub do the work: spun cream climbs a flaring side. Hosea H. Grover of North Cohocton, Steuben County, New York, received US 10,245, dated 15 November 1853, for a rotary churn: a crank and shaft with a transverse piece near the bottom, standing in a step at the tub's bottom, under slats across the top held by wires and a cross piece fastened with staples. Turning it "produces centrifugal motion in the milk and thereby causes it to rise up the flaring surface of the tub until it meets the reactor by which it is beat back upon the dash." The small churn is of tin; for larger quantities he made the tub of wood, less flaring, with a pinion and larger cog wheel to speed the dash. This rung looks at how high spun cream could climb, then prints the dash bar, step, slat rails and bearing block, fits them in a flaring stainless bowl, and makes butter.
Iniciante
About 3 hours, plus printing

Instruções

1

How high it could climb

A carregar o notebook Jupyter…
2

A reaction in the churn before it

The embedded blueprint makes the cream react against oars pitched opposite ways. Grover throws it up a flaring side into fixed slats.
3

Read US 10,245

"These slats are designed to be placed in singly and then the wires passed through them so that the slats may be used in any required number to suit the quantity and quality (that is the thickness) of the milk or cream to be churned. Thus situated the slats constitute a reactor."
4

Print the parts

Print the dash bar b with its square socket (/uploads/blueprints/flaring-tub-slat-reactor-churn-dash-bar.stl), the step (/uploads/blueprints/flaring-tub-slat-reactor-churn-step.stl), two slat rails that hook over the rim like his staples (/uploads/blueprints/flaring-tub-slat-reactor-churn-slat-rail.stl) and the bearing block for the cross piece (/uploads/blueprints/flaring-tub-slat-reactor-churn-bearing-block.stl). Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

Materiais para este passo:

Filamento PETGFilamento PETG1 peça

Ferramentas necessárias:

Impressora 3D de filamento (FDM)Impressora 3D de filamento (FDM)
5

Dash and step

Stand the step in the middle of a large stainless mixing bowl with sloping sides, about 300 mm across. Cut a 10 mm square hardwood shaft to stand in it and reach 60 mm above the rim, push the dash bar onto it 15 mm above the step, and glue a pine crank arm and dowel handle on top.

Materiais para este passo:

Taça grande de aço inoxidávelTaça grande de aço inoxidável1 peça
Cavilhas de madeira duraCavilhas de madeira dura1 peça
Tábua de pinhoTábua de pinho1 peça
Cola de madeiraCola de madeira1 peça

Ferramentas necessárias:

SerroteSerrote
Berbequim sem fiosBerbequim sem fios
Jogo de brocasJogo de brocas
LixaLixa
6

Slats, wires and cross piece

Hook the two rails over the rim opposite each other. Cut hardwood laths 10 mm thick to span between the rails in their grooves, each with a 14 mm hole in its middle for the shaft, and slide in as many as the cream needs, one at a time. Push a 3 mm stainless rod down through each rail and the slat ends, as his wires. Lay a 24 by 12 mm lath across the rim through the bearing block, over the rails, as the cross piece d, the shaft through the block.

Materiais para este passo:

Cavilhas de madeira duraCavilhas de madeira dura1 peça
Varão de aço macioVarão de aço macio1 peça

Ferramentas necessárias:

SerroteSerrote
Berbequim sem fiosBerbequim sem fios
Jogo de brocasJogo de brocas
Serra de arco para metaisSerra de arco para metais
7

The build in 3D

FreeCAD model of this build, not of the patent: the flaring tub cut away to show the step and the dash bar near the bottom, three slats across the top in the rails hooked over the rim, the wires, and the cross piece with its bearing block and the crank.
Arquivo de designBLENDCC0 - Free
8

Spin and make butter

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 1.5 litres. Turn the crank briskly so the cream climbs the bowl's side into the slats; if it does not reach them, take out the top slat and lower the rest. Time until the butter comes. Pour off the buttermilk, add cold water, churn a little and pour off again until it runs clear; work in a pinch of salt and weigh the butter.
Passo 8 - Image 1

Materiais para este passo:

Natas para baterNatas para bater1500 ml
Sal marinho grossoSal marinho grosso1 peça
ÁguaÁgua1 peça

Ferramentas necessárias:

Termómetro de sonda permanenteTermómetro de sonda permanente
CronómetroCronómetro
Balança digital de cozinhaBalança digital de cozinha
Taça grande de aço inoxidávelTaça grande de aço inoxidável
9

Cream that will not climb, a shaft that wanders

Flaring-tub slat-reactor churn troubleshooting.

Flow

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10

History and honest limits

**Hosea H. Grover** of North Cohocton, Steuben County, New York, received US 10,245, dated 15 November 1853 (the drawing sheet reads "H. H. Grover"). He did not claim a conical tub with a revolving dasher, with or without breakers, as such churns had been used before; he claimed such a conical tub with a vertical revolving dasher at its bottom combined with breakers at the top. **Honest limits.** A mixing bowl with curved sides, hardwood and printed parts stand in for his tin cone; the notebook's rise is an upper bound, not a measurement. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

Materiais

9

Ferramentas necessárias

10

Ficheiros de design

1

CC0 Domínio Público

Este blueprint é liberado sob CC0. Você é livre para copiar, modificar, distribuir e usar este trabalho para qualquer finalidade, sem pedir permissão.

Apoie o Maker comprando produtos através do Blueprint, onde ele ganha uma Comissão Maker definida pelos vendedores, ou crie uma nova versão deste Blueprint e inclua-o como conexão no seu próprio Blueprint para compartilhar receita.

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